HELP.....32 or 64 bit

I am attempting to install Windows 7 and use the laptop for a media machine to view TV and Movies I have downloaded. I need to install the 32 bit version on my OEM install disc but it does not ask which one to install. I did the first time I installed it but, due to difficulties encountered after a successful install, I had to reinstall in. Now, it does not ask me and I cannot get "S Video" to work properly. I am assuming it is a 32 or 64 bit issue and need to know what to do to get my OEM install disc to ask me to make the choice...........HELP.........

First go to the S Video manufacturer's Support Downloads webpage to see if they have 64 bit drivers as this may solve your issue. If this came preinstalled also check the Dell Downloads page for your tag number, where you'll also find other drivers you may need.

If this fails you can find everything you need here to Clean Reinstall - Factory OEM Windows 7.